Bleaching compositions

Abstract

The present invention relates to cleaning compositions which comprise radical scavengers, for effective cleaning and improved storage stability. These compositions are suitable for use in various laundry applications including hand and machine laundry methods.

1. A liquid cleaning composition comprising:
 a) from 0.1% to 20% by weight, of an oxidising agent; and  
 b) from 0.001% to 10% by weight, of a radical scavenger, said scavenger selected from the group consisting of: 
 (I) 
                 
 
 
 
       wherein R 20  is the moiety —COOM or —SO 3 M, wherein M is hydrogen or a metal; R 24 , R 25 , R 26 , and R 27  are each independently C 1 -C 10  linear or branched alkyl, —OR′ wherein R′ is C 1 -C 20  linear or branched alkyl, —COOM, —SO 3 M, —Cl, —Br, —NO 2 , and mixtures thereof; R 28  is hydrogen, C 1 -C 10  linear or branched alkyl, —OR′ wherein R′ is C 1 -C 10  linear or branched alkyl, —COOM, —SO 3 M, —Cl, —Br, —NO 2 , and mixtures thereof; 
       (iii) homopolymerx or copolymers comprising units having the formula: 
                 
 
       wherein R 31  is the moiety hydrogen, C 1 -C 10  linear or branched alkyl, —OR′ wherein R′ is C 1 -C 20  linear or branched alkyl, —OH, —COOM, —SO 3 M, —Cl, —Br, —NO 2 , and mixtures thereof; wherein M is hydrogen or a metal; each R 32  is independently hydrogen, C 1 -C 10  linear or branched alkyl, —OR′ wherein R′ is C 1 -C 20  linear or branched alkyl, —COOM, —SO 3 M, —Cl, —Br, —NO 2 , and mixtures thereof; R 1  and R 2  are each independently selected from —C(R 31 ) 2 —, —CO—, —C(O)O—, —C(O)NH—, —O—, —N + (R 31 ) 2 —;
 (iv) and mixtures thereof.  
 
     
     
       2. A composition according to  claim 1  comprising from 0.25% to 8% by weight, of said oxidising agent. 
     
     
       3. A composition according to  claim 2  comprising from 0.5% to 6% by weight, of said oxidising agent. 
     
     
       4. A composition according to  claim 1  comprising from 0.01% to 8% by weight, of said scavenger. 
     
     
       5. A composition according to  claim 4  comprising from 0.1% to 6% by weight, of said scavenger. 
     
     
       6. A composition according to  claim 1  comprising from 0.2% to 4% by weight, of said scavenger. 
     
     
       7. A composition according to  claim 1  wherein said oxidising agent is a source of hydrogen peroxide selected from the group consisting of percarbonates, persilicates, persulphates, perborates, peroxyacids, and mixtures thereof. 
     
     
       8. A composition according to  claim 7  wherein said peroxyacid is diperoxydodecandioic acid, perphthalic acid, perlauric acid, perbenzoic acid, alkylperbenzoic arid, or mixtures thereof. 
     
     
       9. A composition according to  claim 1  wherein said oxidising agent is hydrogen peroxide. 
     
     
       10. A composition according to  claim 1  wherein said radical scavenger is selected from the group consisting of 2,3,4,5 tetramethoxy benzoic acid; 2,3,4,5,6-pentamethoxy benzoic acid; and mixtures thereof. 
     
     
       11. A composition according to  claim 1  further comprising from 60% to 98% weight, of water. 
     
     
       12. A composition according to  claim 11  comprising from 80% to 97% weight, of water. 
     
     
       13. A composition according to  claim 12  comprising from 85% to 97% weight, of water. 
     
     
       14. A composition according to  claim 1  further comprising from 0.1% to 50% by weight, of a surfactant. 
     
     
       15. A composition according to  claim 1  further comprising from 0.001% to 1% of an optical brightener. 
     
     
       16. A liquid cleaning composition comprising:
 a) from 0.1% to 20% by weight, of an oxidising agent; and  
 b) from 0.001% to 10% by weight, of a radical scavenger, said radical scavenger is selected from the group consisting of 2,3,4,5 tetramethoxy benzoic acid 2,3,4,5,6-pentamethoxy benzoic acid; and mixtures thereof.  
 
     
     
       17. A composition according to  claim 16  wherein said oxidising agent is a source of hydrogen peroxide selected from the group consisting of percarbonates, persilicates, persulphates, perborates, peroxyacids, and mixtures thereof. 
     
     
       18. A composition according to  claim 1  wherein said oxidising agent is hydrogen peroxide. 
     
     
       19. A liquid cleaning composition comprising:
 a) from 0.1% to 20% by weight, of hydrogen peroxide;  
 b) from 0.001% to 10% by weight, of a radical scavenger, said radical scavenger is selected from the group consisting of 2,3,4,5 tetramethoxy benzoic acid; 2,3,4,5,5-pentamethoxy benzoic acid; and mixtures thereof; and  
 c) the balance water.  
 
     
     
       20. A method for cleaning hard surfaces comprising the step of contacting a surface with a liquid cleaning composition according to  claim 1 .